Periodic micro-scale domain structures were revealed in congruent LiTaO3 crystals by point electron beam writing in a
scanning electron microscope. Peculiarities of the polarization reversal at point e-beam irradiation of the Y-cuts in
LiTaO3 crystals were investigated. Different distances between the points along Z direction on the polar Y-cuts allow
revealing the long planar domain structures. Various periods of the structures were formed by set of different point
distances in the X direction.